Practice your trivia skills: Science & Nature

Science & Nature

141. What causes the sound of a heartbeat?

Contraction of the heart chambers

Closure of the heart valves

Relaxation of the heart chambers

Blood exiting the heart

142. What is Hypernatremia?

Increase in blood sodium

Decrease in blood potassium

Increase in blood glucose

Decrease in blood iron

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

Node of Ranvier

Myelin sheath

Schwann cell

Islets of Langerhans

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

Pupillary light reflex

Scratch reflex

Gag reflex

Ankle jerk reflex

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

Saturn

Mars

Jupiter

Venus