Half of the fibers of each optic nerve decussate at the __________.

A. superior colliculus
B. optic chiasm
C. lateral geniculate nucleus of the thalamus
D. optic foramen
E. midbrain


B. optic chiasm

Anatomy & Physiology

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What is the average energy expenditure for an active man not engaged in heavy manual labor?

A. 2900 kcal/day B. 3200 kcal/day C. 2100 kcal/day D. 2500 kcal/day

Anatomy & Physiology

Which of the following situations would represent a serious disruption of the homeostasis of the volume and composition of body fluids?

1. Eating a normal meal and drinking a glass of water 2. Normal urination 3. Sweating on a warm day, but drinking lemonade in the shade afterwards 4. Drinking a sports drink after playing a game of basketball with friends 5. Becoming dehydrated as your lifeboat drifts on the empty ocean

Anatomy & Physiology

A(n) ____________________ is the alternating expansion and contraction of an artery as blood flows through it.?

Fill in the blank(s) with correct word

Anatomy & Physiology

which of the following statements are true regarding introns? select all that apply.

a) an intron is a portion of mRNA that does not code for protein b) an intron is a portion of mRNA that must be removed before translation c) an intron is a portion of mRNA that undergoes translation in the cytoplasm

Anatomy & Physiology