21.3B Text B

21.3B Text B

9th - 12th Grade

30 Qs

quiz-placeholder

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21.3B Text B

21.3B Text B

Assessment

Quiz

Biology

9th - 12th Grade

Medium

Created by

Zachary Carousso

Used 3+ times

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30 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary characteristic that distinguishes cardiac muscle from skeletal muscle?
Cardiac muscle has multiple nuclei
Cardiac muscle can contract without nervous system stimulation
Cardiac muscle is not striated
Cardiac muscle is larger in size

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which protein interaction is essential for muscle contraction?
Melanin and keratin
Myosin and actin
Sarcomere and nucleus
Epidermis and dermis

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The sliding-filament model of muscle contraction involves:
Permanent bonds between proteins
Random movement of muscle fibers
Cross-bridges forming and detaching repeatedly
Direct nervous system control

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can humans both push and pull with their muscles?
Because muscles can stretch infinitely
Because muscles work in opposing pairs
Because muscles have multiple nuclei
Because muscles contain melanin

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of melanin in the skin?
Produces vitamin D
Regulates body temperature
Protects against ultraviolet radiation
Removes waste products

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which layer of skin contains blood vessels and nerve endings?
Epidermis
Dermis
Hypodermis
Outer layer

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do blood vessels in the dermis help regulate body temperature?
By producing sweat
By generating melanin
By widening and narrowing
By creating new cells

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