The __________ muscles work tirelessly to pump blood throughout the entire body without rest.
A
cardiac
B
skeletal
C
smooth
Explanation
Cardiac refers to the heart. Cardiac muscles are specialized muscles found only in the heart that contract rhythmically to pump blood.
Blood flows from the upper __________ of the heart into the ventricles before being pumped out.
A
valves
B
arteries
C
chambers
Explanation
The heart has four chambers: two atria (upper chambers) and two ventricles (lower chambers).
When you exercise, your heart muscles __________ more forcefully to supply oxygen to your muscles.
A
expand
B
contract
C
relax
Explanation
Contract means to tighten or shorten. Heart muscles contract to push blood out of the chambers.
The heart is essentially a __________ organ, with spaces inside that fill with blood.
Explanation
Hollow means having a hole or empty space inside. The heart is hollow to allow blood to flow through its chambers.
To maintain a healthy heart, it is advisable to __________ towards a balanced diet and regular exercise.
Explanation
To lean towards something means to prefer or incline toward it. Here it suggests favoring healthy habits.
You need to __________ the orange before squeezing the juice out of it.
Explanation
To peel means to remove the outer skin or covering from a fruit or vegetable.
The heart continues to __________ blood even when we are asleep, demonstrating its incredible endurance.
Explanation
The heart's primary function is to pump blood throughout the circulatory system.
The nurse had to __________ the bandage off the patient's wound carefully.
Explanation
To strip means to remove a covering from something. 'Strip off' is a common phrasal verb meaning to remove.
Heart rates __________ significantly between individuals depending on fitness levels and age.
Explanation
To vary means to differ or change. Heart rates vary from person to person.
After years of hostility, the two brothers finally decided to __________ and forgive each other.
A
have a change of heart
B
break their hearts
C
lose heart
Explanation
To have a change of heart means to change one's opinion or attitude about something, especially to become kinder or more forgiving.
The mother and daughter sat down to __________ about the difficult decision ahead.
A
have a heart attack
B
wear their hearts on their sleeves
C
have a heart-to-heart talk
Explanation
A heart-to-heart talk is an intimate, honest conversation between people about their feelings.
You shouldn't __________ his criticism so personally; he was just trying to help you improve.
A
follow your heart
B
take something to heart
C
have your heart set on
Explanation
To take something to heart means to be deeply affected or upset by someone's words or actions.
Despite everyone's advice, she decided to __________ and pursue her dream of becoming an artist.
A
follow her heart
B
cross her heart
C
eat her heart out
Explanation
To follow one's heart means to do what one truly wants or feels is right, rather than what others suggest.
Ever since she visited Paris as a child, she has __________ becoming a fashion designer.
A
lost heart in
B
broken her heart over
C
had her heart set on
Explanation
To have one's heart set on something means to want something very much and be determined to get it.
The sound of the clock going __________ reminded the patient that time was passing slowly in the hospital.
A
ding dong
B
tick tock
C
click clack
Explanation
Tick tock is the onomatopoeic sound that a clock makes, representing the passage of time.
The H5N1 virus is highly __________ and can spread rapidly among bird populations.
A
contagious
B
harmless
C
beneficial
Explanation
Contagious means capable of being transmitted from one person or organism to another by direct or indirect contact.
The sudden __________ of the disease in several countries alarmed health officials worldwide.
A
disappearance
B
cure
C
outbreak
Explanation
An outbreak is a sudden occurrence of something unwelcome, such as war, disease, or crime.
Young children and the elderly are particularly __________ to respiratory infections.
A
immune
B
susceptible
C
resistant
Explanation
Susceptible means likely or liable to be influenced or harmed by a particular thing.
Scientists are closely monitoring the virus for any signs of __________ that could make it more dangerous to humans.
A
mutation
B
stagnation
C
duplication
Explanation
A mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations.
The rapid global spread of the disease was __________ in modern medical history.
A
expected
B
ordinary
C
unprecedented
Explanation
Unprecedented means never done or known before; unparalleled or unmatched in scale.
The virus can __________ through direct contact with infected birds or contaminated surfaces.
A
disappear
B
transmit
C
vanish
Explanation
To transmit means to pass on from one person or place to another; to communicate or convey.
A new __________ of the virus has emerged that appears to be resistant to current vaccines.
Explanation
A strain is a particular variant of a microbe or virus, often with distinct characteristics.
Widespread __________ programs have been implemented to protect poultry workers.
A
isolation
B
quarantine
C
vaccination
Explanation
Vaccination is the treatment with a vaccine to produce immunity against a disease.
A __________ virus combines genetic material from different viral sources, potentially creating a more dangerous pathogen.
A
pure
B
hybrid
C
ancient
Explanation
A hybrid virus is one that contains genetic material from two or more different viruses.
The __________ specializes in treating children's diseases and developmental issues.
A
pediatrician
B
dermatologist
C
neurologist
Explanation
A pediatrician is a medical practitioner specializing in children and their diseases.
