Biology Quiz

Which state is correct about smooth muscles?

• Is under involuntary control

• Are multinucleated

• Cells are separated by intercalated discs

• Innervated by both sympathetic and parasympathetic systems

An animal cell in a hypertonic solution will be?

• Turgid

• Shriveled

• Plasmolyzed

• Lysed

Relay molecules in a signalling pathway are likely to take part during?

• Reception

• Transduction

• Activation of a cellular response

• Termination

Th percentage of composition of plasma in total human body weight?

• 55%

• 60%

• 20%

• 80%

Hemopoietic activity

• Is indicated by higher reticulocyte

• Is decreased following hemorrhage

• Is normal in anaplastic anaemia

• Is decreased in renal disease

Neutrophils constitute what percentage of white blood cells

• 25-33%

• 3-9%

• 54-62%

• 54-62%

The hyperpolarization phase of the action potential is due to

• Opening of voltage gated Na+ channels

• Prolonged opening of voltage gated K+ channels

• The closure of resting Na+ channels

• Due to the opening of Ca2+ channels

The following are functions of the epithelial tissue except

• Protection

• Absorption

• Filtration

• Contraction

Hematocrit?

• The percentage of white blood cells in blood

• The percentage of plasma proteins in blood

• The percentage of red blood cells in blood

• The percentage of platelets in blood