Q48. Order the function of classes of joints from least movable to most movable

Background

Topic: Classification of Joints

This question tests your understanding of the types of joints in the human body and their relative mobility.

Key Terms:

• Fibrous joints: Immovable

• Cartilaginous joints: Slightly movable

• Synovial joints: Freely movable

Step-by-Step Guidance

1. Recall the three main classes of joints: fibrous, cartilaginous, and synovial.

2. Consider the degree of movement allowed by each type: fibrous joints (like sutures in the skull) are immovable, cartilaginous joints (like intervertebral discs) allow limited movement, and synovial joints (like the shoulder or knee) are freely movable.

3. Arrange these classes in order from least to most movable.

Try solving on your own before revealing the answer!

Q49. Classify fibrous joints

Background

Topic: Types of Fibrous Joints

This question tests your knowledge of the subtypes of fibrous joints and their characteristics.

Key Terms:

• Sutures

• Syndesmoses

• Gomphoses

Step-by-Step Guidance

1. Recall that fibrous joints are connected by dense connective tissue and do not allow movement.

2. Identify the three main types: sutures (found in the skull), syndesmoses (between long bones), and gomphoses (tooth in socket).

3. Think about examples of each type and their locations in the body.

Try solving on your own before revealing the answer!

Q50. Define angular movements

Background

Topic: Types of Joint Movements

This question tests your understanding of movements that change the angle between bones at a joint.

Key Terms:

• Flexion

• Extension

• Abduction

• Adduction

Step-by-Step Guidance

1. Recall that angular movements involve changing the angle between two bones.

2. List the main types: flexion (decreasing angle), extension (increasing angle), abduction (moving away from midline), adduction (moving toward midline).

3. Think about examples, such as bending the elbow (flexion) or straightening the knee (extension).

Try solving on your own before revealing the answer!

Q51. Classify the shoulder joint

Background

Topic: Joint Classification

This question tests your knowledge of the structural and functional classification of the shoulder joint.

Key Terms:

• Synovial joint

• Ball-and-socket joint

Step-by-Step Guidance

1. Recall the structural classification: synovial joints are freely movable and have a joint cavity.

2. Identify the specific type: the shoulder is a ball-and-socket joint, allowing movement in multiple directions.

3. Think about the range of motion possible at the shoulder joint.

Try solving on your own before revealing the answer!

Q52. Identify the joint with the rotator cuff

Background

Topic: Anatomy of the Shoulder

This question tests your knowledge of the rotator cuff and its associated joint.

Key Terms:

• Rotator cuff

• Shoulder joint (glenohumeral joint)

Step-by-Step Guidance

1. Recall the muscles that make up the rotator cuff: supraspinatus, infraspinatus, teres minor, and subscapularis.

2. Identify the joint these muscles stabilize: the shoulder (glenohumeral) joint.

3. Think about the function of the rotator cuff in shoulder movement and stability.

Try solving on your own before revealing the answer!

Q53. Name the movements of elbow and knee joints

Background

Topic: Joint Movements

This question tests your knowledge of the types of movements possible at the elbow and knee joints.

Key Terms:

• Flexion

• Extension

Step-by-Step Guidance

1. Recall that both the elbow and knee are hinge joints.

2. Identify the primary movements: flexion (bending) and extension (straightening).

3. Think about the direction of movement for each joint.

Try solving on your own before revealing the answer!

Q54. Understand the function of skeletal muscle

Background

Topic: Skeletal Muscle Function

This question tests your understanding of the roles played by skeletal muscle in the body.

Key Terms:

• Movement

• Posture

• Heat production

Step-by-Step Guidance

1. Recall that skeletal muscles are attached to bones and cause movement by contracting.

2. Think about other functions: maintaining posture and generating heat.

3. Consider examples of each function in daily life.

Try solving on your own before revealing the answer!

Q55. Classify muscles by their shape, pectoralis major, etc.

Background

Topic: Muscle Classification

This question tests your knowledge of muscle shapes and examples.

Key Terms:

• Parallel

• Pennate

• Convergent

• Circular

Step-by-Step Guidance

1. Recall the main shapes: parallel (e.g., sartorius), pennate (e.g., rectus femoris), convergent (e.g., pectoralis major), circular (e.g., orbicularis oris).

2. Think about the arrangement of muscle fibers in each shape.

3. Match examples to each shape.

Try solving on your own before revealing the answer!

Q56. Define serratus

Background

Topic: Muscle Terminology

This question tests your understanding of the term "serratus" in muscle names.

Key Terms:

• Serratus

Step-by-Step Guidance

1. Recall that "serratus" refers to a saw-toothed or jagged appearance.

2. Think about muscles with this name, such as serratus anterior.

3. Consider the function and location of these muscles.

Try solving on your own before revealing the answer!

Q57. Define action in muscle movement

Background

Topic: Muscle Actions

This question tests your understanding of what is meant by "action" in muscle movement.

Key Terms:

• Action

Step-by-Step Guidance

1. Recall that "action" refers to the specific movement a muscle produces.

2. Think about examples, such as flexion, extension, abduction, etc.

3. Consider how muscles are named for their actions.

Try solving on your own before revealing the answer!

Q58. Define antagonists, synergist, etc.

Background

Topic: Muscle Roles

This question tests your understanding of the roles muscles play during movement.

Key Terms:

• Antagonist

• Synergist

• Agonist (prime mover)

Step-by-Step Guidance

1. Recall that the agonist (prime mover) is the muscle responsible for the main action.

2. Antagonists oppose the action of the agonist.

3. Synergists assist the agonist in performing the movement.

4. Think about examples, such as biceps and triceps during elbow flexion.

Try solving on your own before revealing the answer!

Q59. Understand fulcrum in a lever system, and most common levers in human body

Background

Topic: Levers in the Human Body

This question tests your understanding of lever systems and their components in anatomy.

Key Terms:

• Fulcrum

• Effort

• Load

• First-class, second-class, third-class levers

Step-by-Step Guidance

1. Recall that a lever system consists of a rigid bar (bone), a fulcrum (joint), effort (muscle force), and load (weight).

2. Identify the three classes of levers: first-class (fulcrum between effort and load), second-class (load between fulcrum and effort), third-class (effort between fulcrum and load).

3. Think about which class is most common in the human body.

Try solving on your own before revealing the answer!

Q60. Identify muscle that helps with smiling

Background

Topic: Facial Muscles

This question tests your knowledge of the muscles involved in facial expressions.

Key Terms:

• Zygomaticus major

Step-by-Step Guidance

1. Recall the muscles responsible for elevating the corners of the mouth.

2. Identify the zygomaticus major as the primary muscle for smiling.

3. Think about the location and function of this muscle.

Try solving on your own before revealing the answer!

Q61. Recall action of frontalis, trapezius, masseter/temporalis, deltoid, triceps brachii, rectus abdominis, rectus femoris, etc.

Background

Topic: Muscle Actions

This question tests your knowledge of the actions performed by various muscles.

Key Terms:

• Frontalis: raises eyebrows

• Trapezius: moves scapula

• Masseter/temporalis: jaw movement

• Deltoid: arm abduction

• Triceps brachii: elbow extension

• Rectus abdominis: trunk flexion

• Rectus femoris: knee extension

Step-by-Step Guidance

1. Recall the main action of each muscle listed.

2. Think about the location and movement produced by each muscle.

3. Match each muscle to its primary action.

Try solving on your own before revealing the answer!

Q62. Understand muscles of the thorax/abdomen and breathing

Background

Topic: Respiratory Muscles

This question tests your knowledge of the muscles involved in breathing and their location.

Key Terms:

• Diaphragm

• Intercostal muscles

Step-by-Step Guidance

1. Recall the main muscles involved in breathing: diaphragm and intercostals.

2. Think about how contraction of these muscles changes thoracic volume.

3. Consider the role of abdominal muscles in forced expiration.

Try solving on your own before revealing the answer!

Q63. Know attachment point of sternocleidomastoid

Background

Topic: Muscle Attachments

This question tests your knowledge of the origin and insertion of the sternocleidomastoid muscle.

Key Terms:

• Sternum

• Clavicle

• Mastoid process

Step-by-Step Guidance

1. Recall the origin: sternum and clavicle.

2. Recall the insertion: mastoid process of the temporal bone.

3. Think about the action produced by contraction of this muscle.

Try solving on your own before revealing the answer!

Q64. Identify antagonist to gastrocnemius

Background

Topic: Muscle Antagonists

This question tests your knowledge of opposing muscle actions.

Key Terms:

• Gastrocnemius

• Tibialis anterior

Step-by-Step Guidance

1. Recall the action of the gastrocnemius: plantar flexion of the foot.

2. Identify the muscle responsible for dorsiflexion: tibialis anterior.

3. Think about how these muscles work in opposition.

Try solving on your own before revealing the answer!

Q65. Describe functions of muscle

Background

Topic: Muscle Functions

This question tests your understanding of the various functions muscles perform in the body.

Key Terms:

• Movement

• Posture

• Heat production

• Stabilization

Step-by-Step Guidance

1. Recall the main functions: movement, posture, heat production, and stabilization of joints.

2. Think about examples of each function.

3. Consider how muscles contribute to homeostasis.

Try solving on your own before revealing the answer!

Q66. Describe function of sarcoplasmic reticulum

Background

Topic: Muscle Cell Structure

This question tests your knowledge of the sarcoplasmic reticulum and its role in muscle contraction.

Key Terms:

• Sarcoplasmic reticulum

• Calcium storage

Step-by-Step Guidance

1. Recall that the sarcoplasmic reticulum is a specialized organelle in muscle cells.

2. Think about its role in storing and releasing calcium ions.

3. Consider how calcium release triggers muscle contraction.

Try solving on your own before revealing the answer!

Q67. Understand z disc, sarcomere shortening, etc.

Background

Topic: Muscle Contraction

This question tests your understanding of the structure and function of the sarcomere during contraction.

Key Terms:

• Z disc

• Sarcomere

• Actin

• Myosin

Step-by-Step Guidance

1. Recall that the sarcomere is the functional unit of muscle contraction.

2. Z discs mark the boundaries of each sarcomere.

3. During contraction, the sarcomere shortens as actin and myosin filaments slide past each other.

Try solving on your own before revealing the answer!

Q68. Understand sodium/potassium pump role in resting membrane potential

Background

Topic: Membrane Physiology

This question tests your understanding of how the sodium/potassium pump maintains the resting membrane potential in muscle cells.

Key Terms:

• Sodium/potassium pump

• Resting membrane potential

Step-by-Step Guidance

1. Recall that the sodium/potassium pump moves sodium out and potassium into the cell.

2. This creates a difference in charge across the membrane (more positive outside, more negative inside).

3. Think about how this gradient is essential for muscle cell excitability.

Try solving on your own before revealing the answer!

Q69. Name the synapse of neuromuscular junction

Background

Topic: Muscle Cell Communication

This question tests your knowledge of the synapse where a motor neuron communicates with a muscle fiber.

Key Terms:

• Neuromuscular junction

• Motor end plate

Step-by-Step Guidance

1. Recall that the neuromuscular junction is the site where a motor neuron meets a muscle fiber.

2. The synapse is called the motor end plate.

3. Think about the role of acetylcholine in this process.

Try solving on your own before revealing the answer!

Q70. Understand role of transverse tubules in depolarization

Background

Topic: Muscle Cell Structure

This question tests your understanding of how transverse tubules (T-tubules) help spread depolarization in muscle cells.

Key Terms:

• Transverse tubules (T-tubules)

• Depolarization

Step-by-Step Guidance

1. Recall that T-tubules are extensions of the cell membrane into the muscle fiber.

2. They help transmit the action potential deep into the muscle cell.

3. This ensures that all parts of the muscle fiber contract simultaneously.

Try solving on your own before revealing the answer!

Q71. Recall the term describing the binding of myosin head to actin

Background

Topic: Muscle Contraction

This question tests your knowledge of the term for the interaction between myosin and actin during contraction.

Key Terms:

• Cross-bridge

Step-by-Step Guidance

1. Recall that during muscle contraction, the myosin head binds to actin.

2. This interaction is essential for the sliding filament mechanism.

3. Think about the term used to describe this binding.

Try solving on your own before revealing the answer!