3.2.3 + 4 Blood Cells & Heartbeat FMQuiz Homework Solution
Q. True or False. A nucleus is absent from human red blood cells.
A. TRUE
Q. State two ways in which red blood cells differ from typical body cells e.g. from the cheek lining.
A. No nucleus; haemoglobin; shape; size; no mitochondria; carries O2 or CO2
Q. Name a group of white blood cells, other than lymphocytes.
A. Phagocytic (white cells) or Monocytes
Q. State a precise location in the human body at which red blood cells are made.
A. Marrow of long bones
Q. Cardiac muscle may be described as a contractile tissue. Explain the meaning of the underlined term.
A. It can shorten
Q. True or False. The sino-atrial node (pacemaker) is located on the right side of the heart.
A. TRUE
Q. What is the role of the SA (sinoatrial) and AV (atrioventricular) nodes in the heart?
A. Causes contraction of heart muscle or Pacemaker or Impulse generation
Q. Give any two functions of the lymphatic system.
A. Returns fluid to blood; Transport; Lymphocytes (Immunity)
Q. Mention two ways to maintain a healthy heart.
A. Eat less fat; Exercise regularly; Avoid excess stress; Eat less salt; Don’t smoke
Q. Name the blood vessels that supply the heart cells with blood.
A. Coronary or Cardiac arteries
Q. What causes the sound of a heartbeat?
A. Valves closing
Q. Name the structure in the heart that controls the heartbeat.
A. Pacemaker
Q. Some people may have the blood group B Positive (B+).What factor is present in their blood that makes it positive?
A. Rhesus
Q. Where in the body are white blood cells produced?
A. Bone marrow
Q. Blood is made up of plasma and blood cells. What is plasma?
A. Liquid part of blood
Q. Where is the pacemaker located in the heart?
A. Right atrium
Q. What is the function of white blood cells?
A. Fight disease
Q. Give the precise location of the SA node in the heart.
A. In wall of right atrium
Q. What is the role of valves in the heart?
A. To prevent backflow of blood
Q. Name the blood vessel that brings blood from the heart to the body.
A. Aorta
Q. Give two factors which cause an increase in heart rate.
A. Exercise; Anxiety; Drugs; Infection
Q. Give the precise location of the AV node in the heart.
A. In (or near) septum or Near tricuspid valve or Between atrium and ventricle
Q. What structure(s) protects the heart?
A. Rib cage
Q. Name the valve between the upper and lower chambers on the left-hand side.
A. Bicuspid (mitral) valve
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