Question 1

Which of the following best describes the concept of homeostasis in human physiology?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

A patient is experiencing a rapid increase in blood clotting after a vessel injury. Which type of feedback loop is primarily responsible for this response?

Accepted Answer

Positive feedback loop

Question 3

Which of the following best illustrates a gradient in physiology?

Accepted Answer

Oxygen moving from an area of high concentration in the alveoli to low concentration in the blood.

Question 4

Which of the following is the correct order of the six levels of structural organization in the human body, from simplest to most complex?

Accepted Answer

Chemical, cellular, tissue, organ, organ system, organism

Question 5

A coronal (frontal) plane divides the body into which of the following sections?

Accepted Answer

Anterior and posterior portions

Question 6

Which of the following is NOT a component of the extracellular matrix (ECM) in connective tissue?

Accepted Answer

Keratin

Question 7

Which type of epithelial tissue is best adapted for rapid diffusion and is found lining the air sacs of the lungs?

Accepted Answer

Simple squamous epithelium

Question 8

A gland that releases its secretion by exocytosis without losing any part of the cell is classified as which type?

Accepted Answer

Merocrine gland

Question 9

Which of the following connective tissues contains lacunae, is avascular, and provides support with some flexibility?

Accepted Answer

Hyaline cartilage

Question 10

A neuron receives electrical signals at its ______ and sends them away from the cell body via its ______.

Accepted Answer

dendrites; axon

Question 11

Which of the following best explains why third-degree burns are often not initially painful?

Accepted Answer

Nerve endings in the affected area are destroyed.

Question 12

Which layer of the epidermis is responsible for the continuous production of new keratinocytes?

Accepted Answer

Stratum basale

Question 13

A patient presents with yellowish skin. Which pigment is most likely responsible for this coloration?

Accepted Answer

Carotene

Question 14

Which of the following best describes the function of arrector pili muscles?

Accepted Answer

They contract to cause hair to stand upright, producing 'goosebumps'.

Question 15

Which of the following is a distinguishing feature of thick skin compared to thin skin?

Accepted Answer

Presence of the stratum lucidum

Question 16

Which vitamin is synthesized in the skin upon exposure to ultraviolet (UV) light?

Accepted Answer

Vitamin D

Question 17

Which of the following best describes the secretion of holocrine glands?

Accepted Answer

Entire cells rupture and release their contents as the secretion.

Question 18

Which connective tissue fiber type is most abundant in tendons and provides great tensile strength?

Accepted Answer

Collagen fibers

Question 19

A patient with albinism lacks which of the following in their skin?

Accepted Answer

Melanin

Question 20

Which of the following best explains why populations living near the equator tend to have higher melanin production?

Accepted Answer

Increased melanin protects against DNA damage from higher UV radiation.

Anatomy & Physiology: Core Concepts, Histology, and Integumentary System Study Guide

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