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 different types of joints in the human body and their relative mobility.

Key Terms:

• Synarthrosis: Immovable joint

• Amphiarthrosis: Slightly movable joint

• Diarthrosis: Freely movable joint

Step-by-Step Guidance

1. Recall the three main classes of joints based on their movement: synarthrosis, amphiarthrosis, and diarthrosis.

2. Think about examples of each class (e.g., sutures in the skull for synarthrosis, intervertebral discs for amphiarthrosis, and shoulder or knee for diarthrosis).

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 is about identifying 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 generally allow little to no movement.

2. List the three main types of fibrous joints: sutures, syndesmoses, and gomphoses.

3. Think about where each type is found in the body (e.g., sutures in the skull, syndesmoses between long bones, gomphoses in teeth sockets).

Try solving on your own before revealing the answer!

Q50. Define angular movements

Background

Topic: Types of Joint Movements

This question tests your knowledge of the movements that change the angle between bones.

Key Terms:

• Flexion

• Extension

• Abduction

• Adduction

Step-by-Step Guidance

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

2. List the main types: flexion (decreases angle), extension (increases angle), abduction (moves limb away from midline), adduction (moves limb toward midline).

3. Think about examples of each movement in the body (e.g., bending the elbow for flexion).

Try solving on your own before revealing the answer!

Q51. Classify the shoulder joint

Background

Topic: Joint Classification

This question is about identifying 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 of joints: fibrous, cartilaginous, and synovial.

2. Identify the shoulder joint as a synovial joint.

3. Determine the specific type of synovial joint (ball-and-socket).

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Q52. Identify the joint with the rotator cuff

Background

Topic: Anatomy of Joints

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 what the rotator cuff is: a group of muscles and tendons stabilizing the shoulder.

2. Identify the joint these muscles surround (glenohumeral joint).

3. Think about the function of the rotator cuff in 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 is about identifying the primary movements 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 main movements allowed: flexion (bending) and extension (straightening).

3. Think about examples: bending the elbow or knee for flexion, straightening for extension.

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 skeletal muscles play 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 how muscle contraction leads to these functions.

Try solving on your own before revealing the answer!

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

Background

Topic: Muscle Classification

This question is about identifying muscle shapes and giving examples.

Key Terms:

• Parallel

• Pennate

• Fusiform

• Convergent

Step-by-Step Guidance

1. Recall the main shapes of muscles: parallel, pennate, fusiform, convergent, circular.

2. Think about examples: pectoralis major (convergent), biceps brachii (fusiform), rectus abdominis (parallel).

3. Match each muscle to its shape.

Try solving on your own before revealing the answer!

Q56. Define serratus

Background

Topic: Muscle Terminology

This question is about the meaning 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, like serratus anterior.

3. Consider why the muscle is named for its shape.

Try solving on your own before revealing the answer!

Q57. Define action in muscle movement

Background

Topic: Muscle Actions

This question is about what is meant by the "action" of a muscle.

Key Terms:

• Action

Step-by-Step Guidance

1. Recall that the action of a muscle is the movement it produces when it contracts.

2. Think about examples: flexion, extension, abduction, etc.

3. Consider how the action is determined by the muscle's attachment points.

Try solving on your own before revealing the answer!

Q58. Define antagonists, synergist, etc.

Background

Topic: Muscle Roles

This question is about the different roles muscles play during movement.

Key Terms:

• Antagonist

• Synergist

• Agonist (prime mover)

Step-by-Step Guidance

1. Recall that the agonist is the main muscle responsible for movement.

2. The antagonist opposes the action of the agonist.

3. Synergists assist the agonist in performing the movement.

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

Background

Topic: Biomechanics of Movement

This question is about the concept of levers in the body and the role of the fulcrum.

Key Terms:

• Fulcrum

• Lever

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

Step-by-Step Guidance

1. Recall that a lever consists of a rigid bar (bone) that moves around a fulcrum (joint).

2. Identify the three classes of levers and their arrangement of fulcrum, effort, and load.

3. Think about which lever type is most common in the human body (third-class lever).

Try solving on your own before revealing the answer!

Q60. Identify muscle that helps with smiling

Background

Topic: Facial Muscles

This question is about the muscle responsible for smiling.

Key Terms:

• Zygomaticus major

Step-by-Step Guidance

1. Recall the muscles of facial expression.

2. Identify which muscle elevates the corners of the mouth.

3. Think about the action of smiling and which muscle is involved.

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 is about recalling the specific actions of 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 movement each muscle produces.

3. Match each muscle to its 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 is about the muscles involved in breathing and their actions.

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 is about the origin and insertion of the sternocleidomastoid muscle.

Key Terms:

• Sternum

• Clavicle

• Mastoid process

Step-by-Step Guidance

1. Recall the name: sternocleidomastoid (sternum, clavicle, mastoid).

2. Identify the origin (sternum and clavicle) and insertion (mastoid process).

3. Think about the action produced by this muscle.

Try solving on your own before revealing the answer!

Q64. Identify antagonist to gastrocnemius

Background

Topic: Muscle Antagonists

This question is about identifying the muscle that opposes the action of the gastrocnemius.

Key Terms:

• Tibialis anterior

Step-by-Step Guidance

1. Recall the action of the gastrocnemius (plantar flexion).

2. Identify the muscle responsible for dorsiflexion (opposite action).

3. Think about the location of the antagonist muscle.

Try solving on your own before revealing the answer!

Q65. Describe functions of muscle

Background

Topic: Muscle Functions

This question is about the main functions of muscles in the body.

Key Terms:

• Movement

• Posture

• Heat production

Step-by-Step Guidance

1. Recall the three main functions: movement, posture, heat production.

2. Think about how muscle contraction leads to these functions.

3. Consider examples of each function.

Try solving on your own before revealing the answer!

Q66. Describe function of sarcoplasmic reticulum

Background

Topic: Muscle Cell Structure

This question is about the role of the sarcoplasmic reticulum 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. Identify its main function: storing and releasing calcium ions.

3. Think about 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 is about the structure of the sarcomere and how it shortens during contraction.

Key Terms:

• Z disc

• Sarcomere

• Actin and myosin

Step-by-Step Guidance

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

2. Identify the Z discs as the boundaries of the sarcomere.

3. Think about how actin and myosin interact to shorten the sarcomere.

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 is about the role of the sodium/potassium pump in maintaining the resting membrane potential.

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. Identify how this creates a difference in charge across the membrane.

3. Think about how this difference is essential for muscle and nerve function.

Try solving on your own before revealing the answer!

Q69. Name the synapse of neuromuscular junction

Background

Topic: Muscle Innervation

This question is about the specific synapse where a motor neuron meets a muscle fiber.

Key Terms:

• Neuromuscular junction

• Motor end plate

Step-by-Step Guidance

1. Recall the structure where the nerve meets the muscle.

2. Identify the name of the synapse.

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

Try solving on your own before revealing the answer!

Q70. Understand role of transverse tubules in depolarization

Background

Topic: Muscle Cell Physiology

This question is about the function of transverse (T) tubules in muscle contraction.

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 cell.

2. Identify their role in spreading the action potential.

3. Think about how this leads to calcium release and muscle contraction.

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 is about the specific term for the interaction between myosin and actin during contraction.

Key Terms:

• Cross-bridge

Step-by-Step Guidance

1. Recall the process of muscle contraction at the molecular level.

2. Identify the term for the myosin head attaching to actin.

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

Try solving on your own before revealing the answer!