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

Blood exiting the heart

Relaxation of the heart chambers

142. What is Hypernatremia?

Increase in blood sodium

Decrease in blood iron

Decrease in blood potassium

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?

Scratch reflex

Gag reflex

Pupillary light reflex

Ankle jerk reflex

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

Saturn

Jupiter

Mars

Venus