Answer the following questions true (T) or false (F)

1. T cells are a type of lymphocyte.

2. T cells develop in the thalamus.

3. Helper T cells are also called CD4 cells due to the receptors found on their surfaces.


1. TRUE
2. FALSE
3. TRUE

Biology & Microbiology

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Blood O2 levels have the greatest influence on mammalian breathing rate

Indicate whether the statement is true or false.

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The “Adam’s apple” is located in the ____

a. Glottis b. Pharynx c. Trachea

d. Larynx e. Bronchus

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The __________ valve guards the opening between the right atrium and the right ventricle

a. tricuspid b. bicuspid c. semilunar d. atrial e. mitral

Biology & Microbiology

The first known member of the genus, Homo,

a. H. erectus.
b. H. sapiens.
c. H. neanderthalensis.
d. H. habilis.
e. H. floresiensis

Biology & Microbiology