Question 1

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

Accepted Answer

Negative feedback reduces the effect of the original stimulus to maintain homeostasis, while positive feedback increases the effect of the original stimulus, often leading to a specific event.

Question 2

A patient is given an intravenous solution that is hypertonic relative to their red blood cells. What will most likely happen to the cells?

Accepted Answer

The cells will shrink as water leaves the cell to balance the concentration gradient.

Question 3

Which of the following correctly matches a body system with its primary function?

Accepted Answer

Digestive system: breakdown and absorption of nutrients

Question 4

A neuron transmits a signal from the spinal cord to a skeletal muscle. Which division of the nervous system is primarily involved?

Accepted Answer

Somatic nervous system

Question 5

Which of the following best describes the function of the sodium-potassium pump in the plasma membrane?

Accepted Answer

It uses ATP to actively transport sodium out of the cell and potassium into the cell, maintaining the resting membrane potential.

Question 6

A muscle named 'flexor carpi radialis' most likely:

Accepted Answer

Flexes the wrist on the radial side

Question 7

Which of the following is a correct sequence for the path that light travels through the eye to reach the retina?

Accepted Answer

Cornea → aqueous humor → lens → vitreous humor → retina

Question 8

Which of the following statements about rods and cones in the retina is correct?

Accepted Answer

Cones are responsible for color vision and function best in bright light.

Question 9

A person with damage to Broca's area in the cerebral cortex would most likely experience which of the following symptoms?

Accepted Answer

Difficulty producing coherent speech

Question 10

Which of the following best describes the function of cerebrospinal fluid (CSF)?

Accepted Answer

It provides nutrients, removes waste, and cushions the brain and spinal cord.

Question 11

Which of the following is a property of sound that determines its pitch?

Accepted Answer

Frequency

Question 12

A person is unable to taste sweet foods but can taste sour, salty, and bitter. Which structure is most likely malfunctioning?

Accepted Answer

Fungiform papillae

Question 13

Which of the following equations correctly represents the relationship between concentration gradients and the rate of diffusion across a membrane?

Accepted Answer

$$ J = -D \frac{dC}{dx} $$

Question 14

Which of the following best describes the difference between the peripheral nervous system (PNS) and the autonomic nervous system (ANS)?

Accepted Answer

The ANS is a subdivision of the PNS that regulates involuntary functions such as heart rate and digestion.

Question 15

Which cranial nerve is primarily responsible for transmitting auditory information from the ear to the brain?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 16

A patient with myasthenia gravis has a disorder affecting cholinergic receptors at the neuromuscular junction. Which neurotransmitter's action is most directly impaired?

Accepted Answer

Acetylcholine

Question 17

Which of the following connective tissues is characterized by a rigid matrix containing calcium salts and collagen fibers?

Accepted Answer

Bone (osseous) tissue

Question 18

Which chamber of the cochlea contains perilymph and is involved in transmitting sound vibrations?

Accepted Answer

Scala vestibuli

Question 19

A person with colorblindness most likely has a deficiency in which retinal structure?

Accepted Answer

Cones

Question 20

Which of the following best describes the function of tight junctions between epithelial cells?

Accepted Answer

They prevent the passage of substances between adjacent cells.

Comprehensive Review of Human Anatomy and Physiology: Final Exam Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards