Question 1

Which of the following best describes the difference between negative and positive feedback mechanisms in homeostasis?

Accepted Answer

Negative feedback opposes the original stimulus to maintain stability, while positive feedback amplifies the stimulus to drive a process to completion.

Question 2

A patient is experiencing metabolic acidosis. Which of the following pH values would most likely be observed in their arterial blood?

Accepted Answer

$$7.00$$

Question 3

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

Forming polymers from monomers by removing a molecule of water.

Question 4

A cell is placed in a hypertonic solution. Which of the following will most likely occur?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 5

Which organelle is primarily responsible for the synthesis of proteins that are exported from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 6

Which tissue type is specialized for rapid communication and control of body functions?

Accepted Answer

Nervous tissue

Question 7

A patient suffers a deep cut that damages the reticular layer of the dermis. Which accessory structure is most likely to be affected?

Accepted Answer

Sweat glands

Question 8

During an action potential, which event is responsible for the rapid depolarization phase?

Accepted Answer

Opening of voltage-gated sodium channels

Question 9

Which of the following best describes the role of the cerebellum?

Accepted Answer

Coordination of voluntary muscle movements and balance

Question 10

A patient presents with loss of sensation in the anterior thigh and medial leg. Damage to which nerve plexus is most likely responsible?

Accepted Answer

Lumbar plexus

Question 11

Which of the following is a key difference between the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

Sympathetic division has short preganglionic and long postganglionic fibers; parasympathetic has long preganglionic and short postganglionic fibers.

Question 12

Which cranial nerve is primarily responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (CN II)

Question 13

Which hormone is released in response to increased blood osmolarity and acts to conserve water in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 14

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a pre-existing cartilage model during development.

Question 15

A synovial joint that allows movement in only one plane, such as the elbow, is classified as which type of joint?

Accepted Answer

Hinge joint

Question 16

Which of the following events occurs first during excitation-contraction coupling in skeletal muscle?

Accepted Answer

Binding of acetylcholine to receptors on the motor end plate

Question 17

Which of the following best explains why steroid hormones can pass through the plasma membrane of target cells?

Accepted Answer

They are lipid-soluble and can diffuse through the lipid bilayer.

Question 18

A patient with damage to the ventral horn of the spinal cord would most likely experience which of the following symptoms?

Accepted Answer

Loss of voluntary motor function below the level of injury

Question 19

Which of the following best describes the function of neuroglial cells known as oligodendrocytes?

Accepted Answer

They form myelin sheaths around axons in the central nervous system.

Question 20

Which of the following equations correctly represents the relationship between hydrogen ion concentration $$[H^+]$$ and pH?

Accepted Answer

$$pH = -\log_{10}[H^+]$$

BIOLOGY 109: Comprehensive Study Guide for Anatomy and Physiology

Study Guide - Practice Questions

Study Guide - Flashcards