Practice your trivia skills: Science & Nature

Science & Nature

141. What causes the sound of a heartbeat?

Relaxation of the heart chambers

Contraction of the heart chambers

Blood exiting the heart

Closure of the heart valves

142. What is Hypernatremia?

Decrease in blood iron

Decrease in blood potassium

Increase in blood sodium

Increase in blood glucose

143. Which of these is NOT a part of the structure of a typical neuron?

Schwann cell

Node of Ranvier

Myelin sheath

Islets of Langerhans

144. Which of these is a type of stretch/deep tendon reflex?

Pupillary light reflex

Scratch reflex

Ankle jerk reflex

Gag reflex

145. Which planet did the "Viking 1" spacecraft send surface images of, starting in 1976?

Venus

Mars

Saturn

Jupiter