Developing Sperm Cells Are Protected by a Blood-Testis Barrier Formed

question 56

Multiple Choice

Developing sperm cells are protected by a blood-testis barrier formed by

• A)connective tissue septa.
• B)interstitial spaces.
• C)Leydig cells.
• D)sustentacular cells.
• E)leukocytes.

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Definitions:

Homozygous Recessive

Referring to an individual carrying two copies of a recessive allele for a particular trait, which will be expressed in the organism's phenotype.

Dominant Trait

A genetic trait that is expressed in an organism even when only one copy of the gene responsible for the trait is present.

CFTR Gene

A gene that provides instructions for making a protein that acts as a channel for the movement of chloride ions across cell membranes, mutations of which can lead to cystic fibrosis.

Chloride Ions

Negatively charged ions (Cl-) that are typically found in extracellular fluid and play critical roles in the body's electrolyte balance.