Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone?

A) acetylcholine
B) endorphin
C) serotonin
D) nitric oxide


Answer: B) endorphin

Anatomy & Physiology

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Which muscle is named for either shape or size?

A) pectoralis major B) latissimus dorsi C) deltoid D) vastus lateralis E) All of the above are named for shape or size.

Anatomy & Physiology

Red blood cells aid in clotting

Indicate whether the statement is true or false

Anatomy & Physiology

Steroid hormones are derived from ____________________

Fill in the blank(s) with correct word

Anatomy & Physiology

Why must the DNA be duplicated during the S phase of the cell cycle, prior to mitosis?

What will be an ideal response?

Anatomy & Physiology