AnswersPA Human Anatomy Physiology A 2026-2027 WHITE ICThe Human Skeleton

Muscle Structure and Function Answers

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1
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Which kind of joint allows the arms to swing in circles?

A
hinge
B
ellipsoidal
C
ball-and-socket
D
sliding
2
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How are doctors and paleontologists most similar?

A
Both diagnose injuries.
B
Both study bones.
C
Both look at geological time periods.
D
Both develop treatment plans.
3

The humerus is the long bone that extends from the shoulder to the elbow. Which skeletal system does the humerus belong to?

A
spongy skeleton
B
compact skeleton
C
axial skeleton
D
appendicular skeleton
4

How does the structure of the skull help prevent injury to the brain?

A
The elastic bones of the skull help the skull reshape itself to prevent breakage.
B
The fused bones of the skull lessen the impact on the brain.
C
The spongy bones of the skull cause the ball to bounce off the head.
D
The joints in the skull move to prevent the football from hitting the head.
5

Consider the skeleton. Which type of bone is indicated by the arrow?

Question illustration
A
long
B
irregular
C
flat
D
short
6

Which describes the foramen magnum?

A
large opening at the base of the skull that the spinal cord passes through
B
shallow depression on the skull to which the jaw bone attaches
C
large projection on the skull to which the jaw muscles attach
D
tiny spaces between the fused bones of the skull
7

The carpals are bones that make up part of the hand. To which skeletal system do the carpals belong?

Question illustration
A
spongy skeleton
B
compact skeleton
C
axial skeleton
D
appendicular skeleton
8

Ball-and-socket joints allow this gymnast to complete many of the routines that she performs. In which part of the body is a ball-and-socket joint found?

Question illustration
A
Joint A: wrist
B
Joint B: elbow
C
Joint C: hip
D
Joint D: knee
9

Consider the skeleton.Which skeletal system is represented by the shaded portion of the skeleton?

Question illustration
A
spongy skeleton
B
compact skeleton
C
axial skeleton
D
appendicular skeleton
10

How is the skeleton similar to the frame of a house?

A
Both are made of calcium.
B
Both provide shape and support.
C
Both allow movement.
D
Both separate the structures into compartments.
11

Rheumatoid arthritis is a disease that occurs when the body’s immune system starts attacking its own joint tissue. The symptoms are pain, inflammation, and swelling in the joints. Orthopedists (doctors who study bones) and immunologists (doctors who study the immune system) both work with patients who have rheumatoid arthritis. What is the difference between the orthopedists and immunologists who treat the disease?

A
Only the orthopedists examine the symptoms.
B
Only the immunologists examine the symptoms.
C
The orthopedists focus on the joints, and the immunologists focus on the cause.
D
The immunologists focus on the joints, and the orthopedists focus on the cause.
12

How does the skeletal system help aid the body when it is sick?

A
physical protection of internal organs from disease-causing organisms
B
filtration of disease-causing organisms from the body
C
production of white blood cells that can destroy disease-causing organisms
D
storage of calcium that makes bones stronger and less prone to attack from disease-causing organisms
13

Where is fat stored in the bone?

A
red bone marrow
B
yellow bone marrow
C
spongy bone
D
compact bone
14

How does the skeletal system help aid the body when it is sick?

A
physical protection of internal organs from disease-causing organisms
B
filtration of disease-causing organisms from the body
C
production of white blood cells that can destroy disease-causing organisms
D
storage of calcium that makes bones stronger and less prone to attack from disease-causing organisms
15

Analogies are often used to help make concepts easier to understand. Trisha wants to write an analogy to help her remember the difference between the axial skeleton and the appendicular skeleton. Which is the best analogy?

A
The axial skeleton is like the skin of an apple; the appendicular skeleton is like the core of an apple.
B
The axial skeleton is like the core of an apple; the appendicular skeleton is like the skin of an apple.
C
The axial skeleton is like the frame of a swing set; the appendicular skeleton is like the swings.
D
The axial skeleton is like the swings on a swing set; the appendicular skeleton is like the frame of a swing set.
16

How are doctors and paleontologists most similar?

A
Both diagnose injuries.
B
Both study bones.
C
Both look at geological time periods.
D
Both develop treatment plans.
17

In the body, the homeostasis of which element is related to properties of bone?

A
cesium
B
carbon
C
calcium
D
copper
18

Where is fat stored in the bone?

A
red bone marrow
B
yellow bone marrow
C
spongy bone
D
compact bone
19

How does the structure of the skull help prevent injury to the brain?

A
The elastic bones of the skull help the skull reshape itself to prevent breakage.
B
The fused bones of the skull lessen the impact on the brain.
C
The spongy bones of the skull cause the ball to bounce off the head.
D
The joints in the skull move to prevent the football from hitting the head.
20

Which describes the foramen magnum?

A
large opening at the base of the skull that the spinal cord passes through
B
shallow depression on the skull to which the jaw bone attaches
C
large projection on the skull to which the jaw muscles attach
D
tiny spaces between the fused bones of the skull

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