Which type of chemical messenger stimulates the cell that originally secreted it?

A. Paracrine
B. Neurotransmitter
C. Endocrine
D. Autocrine


Answer: D

Anatomy & Physiology

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Which of the following is produced by certain activated t-lymphocytes to induce apoptosis of infected cells?

A. Perforins
B. Granzymes
C. Interferon
D. Lysozyme

Anatomy & Physiology

The length of hair is determined by the

A. angle of the hair root. B. age of the person. C. rate of hair growth. D. length of the resting stage. E. size of the hair bulb.

Anatomy & Physiology

Integral membrane proteins can form channels through which ions such as Na+ and K+ can diffuse

Indicate whether the statement is true or false.

Anatomy & Physiology

What are the building blocks of proteins?

A. Monosaccharide B. Glycerol C. Amino acid D. Nucleotide

Anatomy & Physiology